*{
    /*float:left;*/
}
header{
    border: 1px solid;
    height:100px;
}

aside{
    border: 1px solid;
    height: 500px;
    padding:15px;
}

article{
     border: 1px solid;
}
article section{
    padding:20px;
    border: 1px solid;
    height: 200px;
}

article aside{
    height: 200px;
}

footer{
    border: 1px solid;
    height:250px;
}

nav{
    margin-left:35%;
}

#a{
   
    
}
#b{
    float: left;
 display:inline;
}
#c{

}

#abc{
    margin-bottom: 20px;
    margin-left: 100px;
}
#def{
    margin-bottom: 20px;
    margin-left: 100px;
}
#ghi{
    margin-left: 200px;
    border:none;
}

button{
    margin-right: 26px;
}